The later models in a family are typically backwards-compatible with the ones that came before.
在一个族中，稍后的产品典型地向后兼容在它以前生产的产品。
2
DHCP is a more flexible, backwards-compatible extension of BOOTP, and some of the latest systems can only boot using DHCP.
DHCP是更灵活的向后兼容的BOOTP扩展，一些最新的系统可能只使用DHCP进行引导。
3
One final note: The new focus model is not completely backwards-compatible with current versions, so existing applications will need to be thoroughly tested.